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Owners
manual

Modifications:

You can update the main power supply the common way: replace the 4 diodes for 8
into
2 bridges to separate power supply in two equal sections after the
transformer, for each
channel one section and take 4 new capacitors of approx
6800 uF, 2 for each section,
ie. for each channel. Also check all caps in the
power sections for the pre-amp.

You can replace all capacitors in the signal path and replace them for HQ
polypropylene caps.

You can replace some resistors in the phono stage signal path, for metal film R's
to get a quiet phono stage.
Also you can replace the transistors for more modern
low noise transistors in the phono stage.

You can replace the final stage power transistors for better quality transistors
with higher Ft.

You can replace the drivers of the power amp with BD139/140 and
put little cooling heatsinks on them.

Sound:

These series of "High Quality"
audio components soon got legendary of their outstanding quality and excelent
sound performance.

Special thanks to Glenn Stewart from Australia
and Helmut Geiselbrechtinger from Germany.